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Biomed Res Int. 2018 Mar 21;2018:5675848. doi: 10.1155/2018/5675848. eCollection 2018.

Does the Width of the Bony Cochlear Nerve Canal Predict the Outcomes of Cochlear Implantation?

Author information

1
Department of Otorhinolaryngology-Head and Neck Surgery, Wonkwang University College of Medicine, Iksan, Republic of Korea.
2
Department of Otolaryngology, Ajou University School of Medicine, Suwon, Republic of Korea.
3
Department of Otolaryngology-Head and Neck Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
4
Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea.
5
Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Republic of Korea.
6
Department of Otorhinolaryngology, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea.
7
Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, Republic of Korea.

Abstract

A narrow bony cochlear nerve canal (BCNC) is associated with sensorineural hearing loss necessitating cochlear implantation (CI). This study evaluated the implications of BCNC width for post-CI outcomes. A total of 56 children who had received CIs were included. The patients were divided into three groups according to the width of the BCNC (Group 1: diameter < 1.4 mm, n = 17; Group 2: diameter 1.4-2.0 mm, n = 14; Group 3: diameter > 2.0 mm, n = 25). The post-CI speech performances were compared among the three groups according to BCNC width. The correlation between BCNC width and post-CI speech performance was evaluated. Logistic regression analysis was also performed to investigate factors that can impact post-CI speech performance. Cochlear nerve deficiency (CND) occurred more frequently in Group 1. Groups 1 and 2 had significantly worse post-CI outcomes. Patients with intact cochlear nerves had significantly better post-CI outcomes than those with CND. When the cochlear nerve was intact, patients with a narrower BCNC showed less favorable results. Therefore, patients with either a narrow BCNC or CND seemed to have poorer outcomes. A narrow BCNC is associated with higher CND rates and poor outcomes. Measurement of BCNC diameter may help predict CI outcomes.

PMID:
29750161
PMCID:
PMC5884285
DOI:
10.1155/2018/5675848
[Indexed for MEDLINE]
Free PMC Article

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